Chuck.



M. A. HAMILTON.

CHUCK.

APPLICATION FILED APR. 7, 1913.

1,1 04, 1 1 3, Patented July 21, 1914 IWW- -lmlmlv 1HE Noma/s PETERScan, WASHINGTON. n. c.

Imrr earns armar gtornio.

MILo e.. HAMILTON, or scories, MICHIGAN;

CHUCK. f

To a'ZZ whom t may concern .f y

Be it known that I, MILo A, HAMILTON, a citizen of the United States,residing at Scotts, Michigan, have invented certain new and usefulImprovements .in Chucks, of which the following is a specification.

This invention relates to improvements in chucks.

The main objects of this invention are: First, to provide an improvedchuck which is adapted for holding drills having shanks of differentforms or drills having driving tangs and those without driving tangs.Second, to provide an improved chuck which is very simple and easy toadjust- Third, to provide an improv-ed chuck which is simple andeconomical in structure, and at the same time, is'capable ofwithstanding very severe strains.

Furtherobjects, and objects relating to structural details, willdelinitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and meansdescribed in the following specification. j

The invention is clearly defined and pointed out in the claims.

A structure which isr a preferredembodiment of my invention is clearly"illustrated in the accompanying drawing forming a part of thisspecification, in which:

Figure I is a side viewof a structure embodying the features of myinventiom'the shank 15 being broken away, a drill being shown inposition in the chuck. Fig. II is a detail vertical section on a linecorresponding to line 9,2 of Fig. III. Fig. III is a detail verticalsection on a line corresponding to line 3-3 of Fig. I. Fig. IV is adetail section on a line corresponding to line l-f1 of Fig. II, showingstructural details of the cross head 8. Fig. V isa detail sect-ion on aline corresponding to line 5 5 of Fig. II. Fig. VI is a. perspectiveview of one of the jaws 4.

In the drawing similar reference characters refer to similar partsvthroughout the several views, and the sectional views are taken lookingin the direction of the little arrows at the ends of the section lines.

Referring to the drawing, the frame-like body 1 is provided with opposedconverging jaw seats 2. These jaw seats are longitudinally slotted at 3.The jaws 4 are platelike in form and are provided with in.v clinedbearing surfaces 5 coacting with the Specification of Letters Patent.4 iPatented` July 21, 1914, Application led April '7, 1913. Serial No.759,416. l

jaw seats 2. Headed pins 6, carried by the jaws 4.-, are arrangedthrough theslots 3 in the jaw seats of the body. These pins are vpreferably threaded into the jaws for con.- venience in assembling theparts, and also for adjustment. I'Ihe slots 3 `are rabbeted at 7 toreceive the heads; of the screws, as shown. The cross head or member 8is arranged to reciprocate in the body above the jaws. This cross headis preferably formed of sections 9 secured together by the bolts 10. Thesections l9 ofv thecross head have opposedVV grooves .11 which, when'lthe sec.- tions are secured kface to face'as shown.. providelongitudinal slots 12 for the headedv pins or Astuds 13 on the upperends of the jaws.` The rsides ofl the body or frame l are. provided withiianges 14 which support the jaws and the cross. heads slidably with:

in the body. As theA cross-head is recipro.- Y

cated, the ,jaws are raised and lowered, and this movement, owing to thearrangement of thejaws on the seats as described,.causes the jaws tomovey toward and ,from 'each other. The shank 15 is threaded throughrthe top of the body or frame memberv and rotatably secured te the crosshead' byf-means ofthel headmlb. v See .I1`ig.-II.I When the shank isturned, -it is obvious that it reciprocates the cross head, and thismoves'the jaws in or out. The shankvl is adapted to'be inserted into thechuck'of drill press or other driving member. j

The faces of thejaws are provided with lalternately disposed grippingmembers 17 at their lower ends and with longitudinally opposedgrooves 18at their upper ends. y The gripping members 17 are notched or grooved at19 in alinement with thegroove 18. Be-` tween the gripping members andthe groove 18, tle jaws are cutA away at 20 to accommodate certain formsof driving tangs.

My improved chuck is adapted for holding various forms of drills such asdrills having round, semi-round, Hat, or square shanks, and shanks withor without driving tangs. My improved chuck is especially designed by mefor heavy work and is well adapted for that purpose. My improvementsare, however, well adapted for embodiment in light Y chucks or chucksdesigned for light work.

I have not attempted to illustrate or describe various modiicationswhich I contemplate as I believe the disclosure made will enable thoseskilled in the art to lwhich my invention relates to embody the same astaste or conditions may dictate. I desire, however, to be understood asclaiming my improvements specifically in the form illustrated, as wellas broadly within the ,scope of the appended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

l. In a chuck, the combination of the body having opposed converginglongitudinally slotted jaw seats, jaws having inclined bearing surfaceson their outer edges coacting with said seats, headed pins on said jawsengaging the slots of said jaw seats, a cross head having longitudinalslots therein, the sides of the body being provided with inwardlyprojecting flanges slidably supporting said jaws and cross head, headedpins on said jaws engaging said slots in said cross head, whereby, asthe cross head is reciprocated, the jaws are moved to and from eachother, and a driving shank having threaded engagement with the body androtatably connected to said cross head.

2. In a chuck, the combination of the body having opposed converginglongitudinally slotted jaw seats, jaws arranged in said seats, headedpins on said jaws engaging the slots of said jaw seats, a cross headhaving longitudinal slots therein, said body being provided with sideparts engaging the sides of the jaws and cross head for laterallysupporting the same for sliding movement in i said body, headed pins onsaid jaws engaging said slots in said cross head whereby, as the crosshead is reciprocated, the jaws are moved to and from each other, and adriving shank having threaded engagement with the body and rotatablyconnected to said cross head.

3. In a chuck, the combination of the body having opposed converginglongitudinally slotted jaw seats, jaws arranged in said seats, a crosshead having longitudinal slots therein, said body being provided withside parts engaging the sides of the jaws and cross head for laterallysupporting the same for sliding movement in said body, headed pins onsaid jaws engaging said slots in said cross head whereby, as the crosshead is reciprocated, the jaws are moved to and from each other, and a.driving shank having threaded engagement with the body and rotatablyconnected to said cross head.

4. In a chuck, the combination of a body having opposed converging jawseats, jaws arranged in said seats and provided with headed members ontheir ends, a driving shank having threaded engagement with said bodyand having a head on its inner end, and a cross head consisting ofsections having opposed grooves coaeting to provide longitudinal slotsin which said headed members of said jaws and shank are engaged, thesides of the body being provided with side parts embracing the ends ofsaid cross head whereby the same is supported for sliding movement.

In witness whereof, I have hereunto set my hand and seal in the presenceof two witnesses.

MIL() A. HAMILTON. [1.. s]

Witnesses:

FRANK SNYDER, I-I. E. RAPP.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of.' Patents,

Washington, D. C.

